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FINANCIAL INSTRUMENTS - Narrative (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2023 | Dec. 31, 2022
Debt and Equity Securities, FV-NI [Line Items] |  |
Realized Investment Gains (Losses) | $ 0 | $ 0
Net unrealized gains/(losses) on investments | (116,600,000) | $ (154,200,000)
Level 2 |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Changes in Fair Value | 500,000 |
Broncus Holding Corporation | Level 1 |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Changes in fair value | $ (400,000) |

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